Police deadly force to defend helpless car

San Francisco police responded to reports Tuesday morning of a knife wielding man in a wheelchair who was slashing tires on a car.

The wheelchair guy was apparently acting like a lunatic when one of the initial responding officer tried to control him with pepper spray, got too close and was stabbed. Several other officers arrived thereafter and, after a short standoff in the middle of 10th Street, knife man was shot with a beanbag shotgun and a handgun.